Heavy rains pour throughout Baryo Mahayop when Jet wakes up to an emergency call: A hideous monster roams a nearby forest, turning every cat it encounters to mindless zombies. This all due to unhygienic habits of a kitten named KenKen, whose refusal to bathe caused it's dirt and grime to mutate into a monster. Jet and the Pet Rangers clash against the monster in a bid to restore peace once again and teach the animals one valuable lesson: Keeping yourself clean.